Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 22, 2024
Abstract
The
ideal
vertical
phase
separation
active
layer
morphology
is
crucial
for
the
photoelectric
conversion
of
organic
solar
cells.
In
this
work,
a
layer‐by‐layer
sequential
deposition
method
used
to
prepare
D18/L8‐BO‐based
cells
and
dual
additives
strategy
adopted
construct
layer.
Additive
DIM
regulates
crystallization
D18
layer,
additive
DIO
induces
L8‐BO
diffuse
into
interior
form
composition
distribution
with
large
donor/acceptor
interpenetrated
regions.
improvement
induced
by
promote
exciton
generation
dissociation,
shorten
charge
transfer
distance,
improve
carrier
dynamics.
With
improved
transport
performance
suppressed
recombination,
short‐circuit
current
density
fill
factor
D18/L8‐BO
quasi‐bulk
heterojunction
are
simultaneously,
power
efficiency
boosted
significantly
from
18.21%
19.59%.
Moreover,
photovoltaic
further
verified
in
D18/Y6
PM6/L8‐BO‐based
cells,
which
implies
generalizability
additive‐assisted
‐sequential
method.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Авг. 5, 2023
Abstract
Given
that
bromine
possesses
similar
properties
but
extra
merits
of
easily
synthesizing
and
polarizing
comparing
to
homomorphic
fluorine
chlorine,
it
is
quite
surprising
very
rare
high-performance
brominated
small
molecule
acceptors
have
been
reported.
This
may
be
caused
by
undesirable
film
morphologies
stemming
from
relatively
larger
steric
hindrance
excessive
crystallinity
bromides.
To
maximize
the
advantages
bromides
while
circumventing
weaknesses,
three
(CH20,
CH21
CH22)
are
constructed
with
stepwise
brominating
on
central
units
rather
than
conventional
end
groups,
thus
enhancing
intermolecular
packing,
dielectric
constant
them
without
damaging
favorable
packing
through
groups.
Consequently,
PM6:CH22-based
binary
organic
solar
cells
render
highest
efficiency
19.06%
for
acceptors,
more
excitingly,
a
record-breaking
15.70%
when
further
thickening
active
layers
~500
nm.
By
exhibiting
such
acceptor,
our
work
highlights
great
potential
achieving
delicately
brominating.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 5, 2025
Abstract
Organic
solar
cells
(OSCs)
have
shown
great
applications
potential
in
flexible/wearable
electronics,
indoor
photovoltaics
and
so
on.
The
efficiencies
of
single‐junction
OSCs
exceeded
19%,
making
the
commercialization
brighter.
Large‐area
printing
fabrication
is
a
key
way
to
OSCs,
solution‐processed
thickness‐insensitive
cathode
interlayers
(CILs)
are
urgently
needed
for
large‐area
fabrication.
High
electron
mobility
interfacial
materials
(CIMs)
critical
enable
CILs.
N‐type
self‐doped
characteristics
can
endow
organic
CIMs
with
high
mobility.
Different
type
n‐type
show
different
applicability
conventional
inverted
OSCs.
External
dopants
further
increase
hybrid
blends.
Particularly,
ZnO
doped
dyes
achieve
superior
photoconductivity
This
review
focuses
on
CILs
high‐performance
In
small
molecules
polymers,
external
n‐doped
blends
as
summarized.
small‐molecular
electrolytes
polyelectrolytes,
PEI‐/PEIE‐based
(including
organic‐organic
ZnO‐organic)
summarized
relationships
between
particular
functions
chemical
structures
highlighted.
Finally,
summary
outlook
provided.
ACS Energy Letters,
Год журнала:
2023,
Номер
8(6), С. 2689 - 2698
Опубликована: Май 23, 2023
Zwitterionic
polymers
or
small
molecules
are
a
class
of
widely
used
interlayer
materials
in
organic
solar
cells
(OSCs).
It
is
challenging
to
develop
such
that
combine
good
film-forming
property,
high
batch-to-batch
reproducibility,
and
broad
thickness
processing
window
device
applications.
Herein,
we
designed
synthesized
two
self-doped
conjugated
mesopolymer
zwitterions
(CMZs),
namely,
MT2PDIMz
MT2PDINz
(PDI
=
perylene-diimide,
M
mesopolymer,
T2
dithiophene,
Mz
imidazolium
zwitterion,
Nz
ammonium
zwitterion).
Both
show
processability
effectively
reduce
the
work
function
metal
electrodes.
The
substitution
cations
with
on
side-chains
can
further
modulate
solution
assembly
self-doping
effect
CMZs,
enabling
improved
interfacial
compatibility
active
layers
higher
electron
mobility
MT2PDIMz.
versatility
CMZs
interlayers
for
OSCs
confirmed
several
binary
ternary
layers,
affording
efficiencies
up
19.01%.
Notably,
over
98%
optimal
efficiency
maintained
as
increases
40
nm
reproducibility.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(7)
Опубликована: Ноя. 1, 2023
Abstract
Anode
interlayers
play
critical
roles
in
organic
solar
cells,
impacting
the
electrode's
work
function,
energy
level
alignment,
hole
extraction,
and
electrode
surfaces.
However,
development
of
commonly
used
anode
interlayer
PEDOT:PSS
lags
behind
rapid
cells
due
to
its
low
conductivity,
acidity,
poor
electron‐blocking
capabilities.
Herein,
an
innovative
strategy
is
proposed
regulate
intrinsic
properties
by
incorporating
molybdenum‐containing
semiconductors
(MoO
3
,
MoS
2
),
which
validated
using
state‐of‐the‐art
active
layer
consisting
PM6:Y6
conventional
devices.
The
addition
alters
aggregation
morphology
layer,
increasing
conductivity
reducing
acidity.
Furthermore,
extraction
ability
are
improved
changing
function
with
influence
deep
forming
a
trap
capture
electrons.
Consequently,
when
employed,
champion
power
conversion
efficiency
17.1%
devices
18.9%
composed
PM6:L8‐BO
achieved.
results,
enhance
semiconductors,
offer
valuable
guidelines
for
engineering
fabricate
highly
efficient
non‐fullerene
cells.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(13)
Опубликована: Дек. 15, 2023
Abstract
Controlled
sequential
crystallization
of
donors
and
acceptors
is
a
critical
factor
for
achieving
enhanced
phase
separation
efficient
charge
transfer
performance
in
polymer
solar
cells
(PSCs).
In
this
study,
comprehensive
investigation
structurally
simple
solvent
additive,
1‐fluoro‐2‐iodobenzene
(OFIB)
conducted,
which
efficiently
controls
the
morphology
active
layer,
resulting
fibrous
assembly
significantly
enhancing
power
conversion
efficiency
from
16.34%
to
18.38%
based
on
PM6:L8‐BO
system.
Density
functional
theory,
molecular
dynamics
simulations,
grazing
incidence
small‐
wide‐angle
X‐ray
scattering
techniques
reveal
that
addition
OFIB
processed
blend
aligns
orientation
acceptor
molecules,
thereby
overall
π–π
stacking
layer.
establishes
nearly
equal‐strength
interactions
with
conjugated
frameworks
both
donor
materials,
benefiting
multiple
electron
conjugation
between
its
iodine
atom
framework
Femtosecond‐timescale
photophysical
studies
demonstrate
OFIB‐optimized
layer
shows
reduced
exciton
losses
at
donor–acceptor
interface.
This
study
offers
new
perspective
mechanism
underlying
function
additives
presents
research
methodology
will
guide
development
next‐generation
non‐fullerene
PSCs.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(36)
Опубликована: Май 13, 2023
Abstract
The
electron
transport
layer
(ETL)
is
a
critical
component
in
achieving
high
device
performance
and
stability
organic
solar
cells.
Conjugated
polyelectrolytes
(CPEs)
have
become
an
attractive
alternative
due
to
film‐forming
properties
ease
of
preparation.
However,
p‐type
CPEs
generally
exhibit
poor
charge
mobility
conductivity,
incorporation
electron‐withdrawing
units
forming
alternated
D‐A
conjugated
backbone
can
make
up
for
these
deficiencies.
Herein,
the
ratio
withdrawing
moieties
are
further
increased
two
poly(A1‐alt‐A2)
typed
PIIDNDI‐Br
PDPPNDI‐Br
based
on
combination
naphthalene
diimide
(NDI)
with
isoindigo
(IID)
or
diketopyrrolopyrrole
(DPP)
via
direct
arylation
polycondensation
synthesized.
These
possess
excellent
alcohol
solubility,
suitable
lowest
unocuppied
molecular
orbital
energy
level,
work
function
tunability.
Surprisingly,
IID
DPP
generate
distinct
self‐doping
behaviors,
which
confirmed
by
UV–vis
absorption
ESR
spectra.
no
matter
doped
undoped,
both
present
better
charge‐transporting
conductivity
when
utilized
as
ETLs.
display
good
universal
compatibility
blend
PM6:Y6
PM6:L8‐BO,
PCEs
18.32%
18.36%
obtained,
respectively,
also
storage
stability.
In
short,
different
acceptors
demonstrates
efficient
strategy
design
highly
ETLs
photovoltaic
devices.
